Add some git version diagnostics and switch to ruby 3.3

.github/workflows/ci.yaml

@@ -12,9 +12,15 @@ jobs:
     strategy:
       matrix:
         ruby-version:
-        - '3.1'
+        - '3.3'
     steps:
     - uses: actions/checkout@v4
+    - run: |
+        git --version
+        echo "------------------"
+        git config --global --list
+        echo "------------------"
+        git config --list
     - name: Set up system
       run: bin/before_install
     - name: Set up Ruby